**Answer:**

Answer:

1). Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.

2). Current is the flow of electrons through a circuit.

Explanation:

1). Current is measured in amps and is represented by the symbol "Δ" The relationship between current, voltage, and resistance is mathematically defined by Ohm's Law.

As per Ohm's law we know that

here we have

V = voltage difference across the resistor

R = resistance of the conductor

2). Current is the flow of electrons through a circuit.

Rate of flow of charge is known as electric

**Answer:**

Vector quantity.

**Explanation:**

Acceleration is defined as the rate of change in the value of velocity with the time change.

Acceleration can be defined by the second law of newton in which the acceleration is produce due to the net force.

The SI unit of acceleration is .

The acceleration follow all the law of vector addition, whether parallelogram law of addition as well as triangular law of vector addition.

Therefore, by the above discussion we can define that the acceleration is a vector quantity.

**The constant force required is 17.6 N**

<u>**Explanation:**</u>

Given-

Mass, m = 0.55 kg

Initial speed, u = 0

Final speed, v = 8 m/s

Time, t = 0.25 s

Force, F = ?

We know,

Force = mass X acceleration

F = 0.55 X

F = 0.55 X

F = 17.6 N

**Therefore, the constant force required is 17.6 N**

**Answer:**

v = 2.72 m / s

**Explanation:**

Let's write the equation of the moment

p = mv

In this case the system is formed by the two people

Initial moment

p₀ = p₁ - p₂

Final moment

= (m₁ + m₂) v

p₀ = p_{f}

p₁ - p₂ = (m₁ + m₂) v

v = (p₁ -p₂) / (m₁ + m₂)

Let's calculate

v = (700 - 400) / (50 + 60)

v = 2.72 m / s

**Answer:**

A. There is a localization of positive charge near the door handle.

**Explanation:**

- When on a cold morning a person wearing cotton/ polyester cloth walking on the carpet moves toward his car then due to friction between the feet and the carpet there are transfer of electrons from the carpet to our feet, and since our body is a good conductor of electricity the charges spread throughout on the surface of or body.

- When the person brings his hands close to the neutral conducting door of the car it gets induced with equal intensity of opposite charge to our hands thus having a concentration of positive charges near to the hand on the car's door is developed as a result of
**polarization **within the conductor.